9.8

CVE-2021-46911: ch_ktls: Fix kernel panic

Modified
AliasesUBUNTU-CVE-2021-46911DEBIAN-CVE-2021-46911
Published 27-02-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-46911 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 48.7% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.60%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1

Timeline

  1. 27-02-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ch_ktls: Fix kernel panic Taking page refcount is not ideal and causes kernel panic sometimes. It's better to take tx_ctx lock for the complete skb transmit, to avoid page cleanup if ACK received in middle.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.60%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.60% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu62 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 5a4b9fe7fece62ecab6fb28fe92362f83b41c33e, < 8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091f | ≥ 5a4b9fe7fece62ecab6fb28fe92362f83b41c33e, < 8348665d4181c68b0ca1205b48e1753d78bc810f | ≥ 5a4b9fe7fece62ecab6fb28fe92362f83b41c33e, < 1a73e427b824133940c2dd95ebe26b6dce1cbf10 | 5.7
  • linux_kernel≥ 5.7.0, < 5.10.32 | ≥ 5.11.0, < 5.11.16
Debian1 product
  • linux< 5.10.38-1

3 vendors · 65 products

References

7 links